Convergent evolution is widely regarded as a signature of adaptation. However, testing the
adaptive consequences of convergent phenotypes is challenging, making it difficult to …

The common pauraque Nyctidromus albicollis (Gmelin, 1789) is a widespread avian
species; however due to its nocturnal habits and reclusive behaviour, little is known about …

We describe for the first time the visual fields of the largest tropical raptor, the Harpy Eagle
(Harpia harpyja), a powerful keystone species that hunts almost exclusively in forested …

Vögel orientieren sich primär optisch und sind daher kaum in der Lage, selbst eine nur
teilweise eingeschränkte Sehfähigkeit durch andere Sinnesleistungen zu kompensieren …

The nictitating membrane [from the Latin word nictare, which means blink] is a transparent or
translucent third eyelid present in some animals that can be drawn across the eye from the …